Organic/inorganic composite coating film, structural color film using the same, and preparation methods thereof

Inactive Publication Date: 2010-04-29
DAINIPPON INK & CHEM INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020]Furthermore, the method for preparing the structural color film of the present invention is a method for easily preparing a structural color film having no defect and having a three dimensional, internal regular porous structure in any of the shapes on a variety of solid substrate, such as glass, a metal, a metal oxide, and the like, and further, it enables a self-standing film as well as a film on a substrate to be obtained. The structural color film of the present invention thus obtained or the substrate coated with the structural color film has neither cr

Problems solved by technology

The silica block has holes on the surface, but the holes have more or less different diameters, and thus the patterns are not controlled.
Furthermore, in the case where a compound having a fluorescence or a coloring property is introduced to a water soluble polymer so as to provide the coating film with a new function, the shape of the formed hole changes, and therefore, it is insufficient for general applicability.
Further, since the coating film does not have a hollow structure therein and the aqueous polymers are not regularly arranged, the color of the metal oxide only is developed even after calcination of the coating film, and accordingly, the structural color is not developed.
However, the holes are not formed on the film surface, nor do they have a hollow structure therein.
As a result, the sol-gel reaction of the silane compound is affected, and correspondingly, the physical properties of the organic/inorganic composite coating film thus obtained are also affected, which limits the range of applications.
Moreover, even though the coating film is burned to remove the core-shell particles, the particles are not regularly arranged, and therefore, the structural color is not developed.
However, in the method of Holland, there has been a problem that after the preparation of the colloidal crystal, the metal alkoxide is packed in the densely packed and very narrow void of the particles, and thus, when the void portion of the surface is packed with these materials, nothing can penetrate thereinto, and the

Method used

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  • Organic/inorganic composite coating film, structural color film using the same, and preparation methods thereof
  • Organic/inorganic composite coating film, structural color film using the same, and preparation methods thereof
  • Organic/inorganic composite coating film, structural color film using the same, and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Example

Synthesis Example 1

Synthesis of Hollow Polymer Particle B-1 Comprising PNIPAM-co-PGMA

[0134]To 290 ml of an aqueous solution in which 1.8 g of N-isopropylacrylamide (manufactured by Kohj in Co., Ltd., hereinafter referred to as NIPAM) had been dissolved was added 11.8 g of glycidylmethacrylate (manufactured by Wako Pure Chemicals Co., hereinafter referred to as GMA), followed by stirring at 70° C. under nitrogen flow (GMA / NIPAM=5.2 mol / mol). As the water soluble polymerization initiator, 10 ml of an aqueous solution in which 0.15 g of 2,2′-azobis(2-amidinopropane) dihydrochloride (V-50, manufactured by Wako Pure Chemicals Co.) had been dissolved was added thereto. By stirring it at the temperature for 1 hour, a dispersion liquid of the particles was obtained. This dispersion liquid was washed by a centrifuging operation, and then the shape of the fine particle was observed by means of SEM, and thus, it was found to be a monodisperse spherical particle having an average particle diame...

Example

Synthesis Example 2

Synthesis of Hollow Polymer Particle B-2 Comprising PACMO-co-PGMA

[0135]To 290 ml of an aqueous solution in which 1.8 g of acryloyl morpholine (manufactured by Kohjin Co., Ltd., hereinafter referred to as ACMO) had been dissolved was added 13.5 g of GMA, followed by stirring at 70° C. under nitrogen flow (GMA / ACMO=4.8 mol / mol). 10 ml of the aqueous solution in which 0.15 g of V-50 as the water soluble polymerization initiator had been dissolved was added thereto. By stirring it at the temperature for 1 hour, a dispersion liquid of the particles was obtained. This dispersion liquid was washed by a centrifuging operation, and then the shape of the fine particle was observed by means of SEM, and thus, it was found to be a monodisperse spherical particle having an average particle diameter of 270 nm (FIG. 3). This fine particle was crushed and its morphology observation was carried out. As a result, it could be confirmed that it was a hollow polymer particle having a c...

Example

Example 3

[0139]The aqueous coating composition prepared in Example 1 was coated with a painting brush on a glass plate, and left to stand at 25° C. From the SEM observation of the obtained pattern composite coating film surface, the surface morphology in which the fine particles were regularly arranged in close packed array was found (FIG. 8).

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Abstract

An organic/inorganic composite coating film comprising an inorganic material as a matrix and an organic material combined therewith. The coating film has a regular hollow structure therein, and the coating film surface has a rugged pattern with semispherical protrusions. Also provided is a large-area structural color film obtained by burning the composite coating film. The organic/inorganic composite coating film is obtained by applying an aqueous coating composition comprising a metal alkoxide, an aqueous dispersion of monodisperse polymer particles, and an acid catalyst to a substrate and curing the coating composition. Burning the organic/inorganic composite coating film gives the structural color film.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This is the U.S. national phase application under 35 U.S.C. §371 of International Patent Application No. PCT / JP2008 / 054044, filed Mar. 6, 2008, which claims the benefit of Japanese Application No. 2007-064983, filed Mar. 14, 2007, both of which are hereby incorporated by reference in their entireties. The International Application was published on Oct. 9, 2008 as International Publication No. WO / 2008 / 120529 A1 under PCT Article 21(2).TECHNICAL FIELD[0002]The present invention relates to an organic / inorganic composite coating film, which includes an organic material combined with a matrix including an inorganic material, wherein the coating film has a spherical regular hollow structure therein and a semispherical regular peak-valley surface profile, and to a method for preparing the same. Further, the present invention relates to a structural color film with a large area having no defects, obtained by calcination of the organic / inorganic c...

Claims

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Application Information

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IPC IPC(8): B32B3/26B05D3/10C09D7/65
CPCC03C1/008Y10T428/24388C08K3/22C08L2205/20C09D1/00C09D7/1266C09D7/1275C09D7/1283C09D7/1291C23C18/1216C23C18/1254C23C18/127C23C18/1295Y10T428/24405C03C17/009C09D7/67C09D7/68C09D7/69C09D7/70Y10T428/249953C09D7/65B05D5/06B05D7/24
Inventor FUKAZAWA, NORIMASAJIN, REN-HUA
Owner DAINIPPON INK & CHEM INC
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